Compress WebP
Your WebP, only smaller — re-encoded at the quality you pick or to an exact KB target, without leaving your device.
Drop your image here
or
JPG, PNG, WebP, HEIC, SVG — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
WebP is usually the destination of compression, but sometimes it needs another pass: an export that came out heavier than expected, an asset that must duck under a page-weight budget, or a batch of images headed for a template with hard size rules. This tool re-encodes WebP to WebP at the quality you choose — or walks its exact-size search to hit a KB number — entirely in your browser.
The honesty rules apply here like everywhere on this site: if your WebP is already smaller than any re-encode we can produce, you get the original back untouched with a note saying so — a compressor should never grow a file. Batches work too, each file keeping its own name.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Choose quality or size
Pick a quality preset, set an exact KB target, or switch the output format — tuned for compress webp.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
How much smaller will my WebP get?
It depends on how it was first encoded. Files saved at high quality settings often shrink 30–60% with no visible change; files that were already tightly optimized may not shrink at all — in which case the original is returned unchanged rather than re-encoded for nothing.
Does compressing WebP again stack quality loss?
Each lossy re-encode costs a little fidelity, so avoid repeated passes. One controlled compression from a good source is the right pattern; keep your original as the master and compress copies.
Can I hit an exact file size?
Yes — set the KB target and the tool binary-searches quality, then steps dimensions down only if needed. If the target is impossible, it refuses honestly instead of delivering a broken file.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.